Wheres the best place to get inexpensive (note, not 'CHEAP') wiring?

I need 10' 0, 2x 4' 4 red, 2x 4' black, terminals, and some 14-16g +/-.... roughly 30'.


Also...

I'm running a KDC-x569, JL 500/1, 300/4. I've got boston acoustics all around and an xtrant aluminum cone hex 10" in an extended cab ford ranger.

My questions:

Better sound from bridging 150 to each of front speakers and leave rears on deck power?

Any idea of a better while inexpensive sub for my setup? I'm really looking for some volume here, the current setup isnt nearly loud enough... but im on a budget.